MCHC908JW32FC Freescale Semiconductor, MCHC908JW32FC Datasheet - Page 81
![IC MCU 32K FLASH 8MHZ 48-QFN](/photos/12/17/121792/mchc908jw32fc_sml.jpg)
MCHC908JW32FC
Manufacturer Part Number
MCHC908JW32FC
Description
IC MCU 32K FLASH 8MHZ 48-QFN
Manufacturer
Freescale Semiconductor
Series
HC08r
Datasheet
1.RD3152MMA7260Q.pdf
(232 pages)
Specifications of MCHC908JW32FC
Core Processor
HC08
Core Size
8-Bit
Speed
8MHz
Connectivity
SPI, USB
Peripherals
LED, LVD, POR, PWM
Number Of I /o
29
Program Memory Size
32KB (32K x 8)
Program Memory Type
FLASH
Ram Size
1K x 8
Voltage - Supply (vcc/vdd)
3.5 V ~ 5.5 V
Oscillator Type
Internal
Operating Temperature
0°C ~ 70°C
Package / Case
48-QFN
Controller Family/series
HC08
No. Of I/o's
29
Ram Memory Size
1KB
Cpu Speed
8MHz
No. Of Timers
1
Embedded Interface Type
SPI, USB
Rohs Compliant
Yes
Processor Series
HC08JW
Core
HC08
Data Bus Width
8 bit
Data Ram Size
1 KB
Interface Type
SPI, USB
Number Of Programmable I/os
29
Number Of Timers
2
Maximum Operating Temperature
+ 70 C
Mounting Style
SMD/SMT
Development Tools By Supplier
FSICEBASE, DEMO908GZ60E, M68EML08GZE, KITUSBSPIDGLEVME, KITUSBSPIEVME, KIT33810EKEVME
Minimum Operating Temperature
0 C
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Eeprom Size
-
Data Converters
-
Lead Free Status / Rohs Status
Details
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If the stop enable bit, STOP, in the mask option register is logic 0, the SIM treats the STOP instruction as
an illegal opcode and causes an illegal opcode reset. The SIM actively pulls down the RST pin for all
internal reset sources.
6.3.2.4 Illegal Address Reset
An opcode fetch from an unmapped address generates an illegal address reset. The SIM verifies that the
CPU is fetching an opcode prior to asserting the ILAD bit in the SIM reset status register (SRSR) and
resetting the MCU. A data fetch from an unmapped address does not generate a reset. The SIM actively
pulls down the RST pin for all internal reset sources.
6.3.2.5 Low-Voltage Inhibit (LVI) Reset
The low-voltage inhibit module (LVI) asserts its output to the SIM when the V
LVI
(RST) is held low while the SIM counter counts out 4096 + 32 CGMXCLK cycles. Thirty-two CGMXCLK
cycles later, the CPU is released from reset to allow the reset vector sequence to occur. The SIM actively
pulls down the RST pin for all internal reset sources.
6.3.2.6 Universal Serial Bus (USB) Reset
The USB module will detect a reset signaled on the bus by the presence of an extended SE0 at the USB
data pins of a device. The MCU seeing a single-ended 0 on its USB data inputs for more than 2.5µs treats
that signal as a reset. After the reset is removed, the device will be in the attached, but not yet addressed
or configured, state (refer to Section 9.1 USB Devices of the Universal Serial Bus Specification Rev. 2.0).
The device must be able to accept the device address via a SET_ADDRESS command (refer to Section
9.4 of the Universal Serial Bus Specification Rev. 2.0) no later than 10ms after the reset is removed.
USB reset can be disabled to generate an internal reset. It can be configured to generate IRQ interrupt.
(See
6.4 SIM Counter
The SIM counter is used by the power-on reset module (POR) and in stop mode recovery to allow the
oscillator time to stabilize before enabling the internal bus (IBUS) clocks. The SIM counter also serves as
a prescaler for the computer operating properly module (COP). The SIM counter overflow supplies the
clock for the COP module. The SIM counter is 12 bits long.
6.4.1 SIM Counter During Power-On Reset
The power-on reset module (POR) detects power applied to the MCU. At power-on, the POR circuit
asserts the signal PORRST. Once the SIM is initialized, it enables the clock generation module (CGM) to
drive the bus clock state machine.
6.4.2 SIM Counter During Stop Mode Recovery
The SIM counter also is used for stop mode recovery. The STOP instruction clears the SIM counter. After
an interrupt, break, or reset, the SIM senses the state of the short stop recovery bit, SSREC, in the mask
Freescale Semiconductor
TRIPF
Chapter 3 Configuration Registers
voltage. The LVI bit in the SIM reset status register (SRSR) is set, and the external reset pin
USB reset is disabled when the USB module is disabled by clearing the
USBEN bit of the USB address register (UADDR).
MC68HC908JW32 Data Sheet, Rev. 6
(CONFIG).)
NOTE
DD
voltage falls to the
SIM Counter
81
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